feat: add certificate gallery and certifications section components

- Implemented CertificateGallery component to display certification images in a gallery format.
- Created CertificationsSection component to showcase certifications with titles and descriptions.
- Enhanced Gallery component to support animations and keyboard navigation.
- Introduced Select component for dropdown selection with images.
- Added utility functions for API responses and pagination handling.
- Implemented localization functions for text and content.
- Created a custom hook for detecting clicks outside of a component.

next-sitemap.config.js

@@ -1,5 +1,5 @@
 module.exports = {
-  siteUrl: process.env.SITE_URL || 'http://localhost:3000',
+  siteUrl: process.env.SITE_URL || 'http://localhost:4000',
   generateRobotsTxt: true,
   changefreq: 'weekly',
   priority: 0.7,